<title>High-Pass Filter (RC)</title>
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<p>
This is a <a
      href="http://hyperphysics.phy-astr.gsu.edu/hbase/electric/filcap.html">high-pass
      filter</a> implemented using a resistor and a capacitor.  A
      high-pass <a href="http://en.wikipedia.org/wiki/Electronic_filter">filter</a> passes
higher frequencies and attenuates lower
      frequencies.  The
      input frequency keeps changing, sweeping up and down the
      spectrum to demonstrate the change in response.
The capacitor passes higher frequencies, causing the output voltage to
      fluctuate more.  Lower frequencies are blocked, and there is
      reduced current across the resistor, keeping the
      output voltage closer to ground.
<p>The breakpoint (-3 <a href="http://en.wikipedia.org/wiki/Decibel">dB</a> point) is
shown at the lower right, as "f.3db".

<p>
Next: <a href="e-filt-hipass-af.html">High-Pass Filter response (RC)</a><br>
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<br>Generated Tue Dec  7 2010
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